dependency-cruiser/src/report/anon/random-string.mjs

Validate and visualize dependencies. With your rules. JavaScript, TypeScript, CoffeeScript. ES6, CommonJS, AMD.

import { randomInt } from "node:crypto";

const NUMBER = 0;
const SEPARATOR = 1;
const UPPERCASE = 2;
const NOTHING_SPECIAL = 3;

function isSeparator(pChar) {
	const lSeparatorsRe = /[-_.]/;

	return lSeparatorsRe.test(pChar);
}

function isUpperCase(pChar) {
	return pChar.toUpperCase() === pChar;
}

function classifyChar(pChar) {
	if (/\d/.test(pChar)) return NUMBER;
	if (isSeparator(pChar)) return SEPARATOR;
	if (isUpperCase(pChar)) return UPPERCASE;
	return NOTHING_SPECIAL;
}

function getRandomChar(pChar) {
	const lLowerCaseChars = "abcdefghijklmnopqrstuvwxyz";
	const lMaxDecimalChar = 9;

	switch (classifyChar(pChar)) {
		case SEPARATOR:
			return pChar;
		case NUMBER:
			return randomInt(0, lMaxDecimalChar);
		case UPPERCASE:
			return lLowerCaseChars[
				randomInt(0, lLowerCaseChars.length - 1)
			].toUpperCase();
		default:
			return lLowerCaseChars[randomInt(0, lLowerCaseChars.length - 1)];
	}
}

/**
 * Returns a random string with the same length as pString
 * ascii characters - respecting case & numbers + leaving separators
 * (-, _, .) in place
 *
 * hello => tbkwd
 * randomString => ybmaecNtpmty
 * __interesting-stuff => __uuhfiitcvoq-rudbk
 * pulp2slurp => jgyb3guyow
 *
 * @param {string} pString - any string
 * @return {string} - a random string with above specs
 */
export default function getRandomString(pString) {
	return Array.from(pString).map(getRandomChar).join("");
}